Bench for positioning the upper part of the guide tube
A technology of guiding pipes and benches, which is applied in construction, foundation structure engineering, sheet pile walls, etc., can solve the problem that the verticality of construction can only reach 1/300, achieve high guiding precision, simple bench structure, and convenient use Effect
Active Publication Date: 2019-10-01
上海开普天岩土科技集团有限公司 +1
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Problems solved by technology
The current one-column-one-pile construction method can only reach 1 / 300 of the construction verticality
Method used
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Embodiment Construction
[0016] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0017] Such as figure 1 , shown in 2, the stand 3 that is used for guide tube top location of the present invention is welded into square frame 31 by angle steel, and the following four jiaos of square frame 31 are provided with support angle steel 32, is connected with cross bar 33 between support angle steel 32, Reinforcing bolt 35 is housed in the middle of cross bar 33, is used for positioning and fixing with casing 1. The outer dimension of the square frame 31 is 3650 mm×3650 mm, and its height H is 200-5000 mm. The stand 3 is adjustablely connected to the ground steel plate of the foundation pit through four mechanical jacks 34 located on the outside of the four supporting angle steels 32 .
[0018] Such as image 3 , shown in 4, during use, by adjusting four reinforcing bolts 35 between the stand 3 and the casing 1, the center of the stand 3 i...
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The invention relates to a rack for positioning the upper portion of a guide tube. A square framework is welded through angle steel, the four corners on the lower portion of the square framework are all provided with supporting angle steel, a cross rod is connected between every two adjacent pieces of supporting angle steel, a strengthening bolt is installed at the middle of each cross rod, and the strengthening bolts are used for positioning fixing of the cross rods and a guard barrel. The rack is adjustably connected with ground steel plates of a foundation pit through mechanical jacks located on the outer sides of the four pieces of supporting angle steel. When the rack is used, the center of the rack is made coincident with that of the guard barrel by adjusting the four strengthening bolts, the central axis of the rack is made coincident with that of the guard barrel by adjusting the four mechanical jacks, the guide tube is inserted into the well-adjusted rack, and the guide tube is fixed to the rack in a positioned mode through guide tube positioning steel plates. The rack is used for installing the guide tube, the guide tube is used for guidance of steel stand columns, and the guide accuracy is high; the center and verticality of the rack are adjusted through the four strengthening bolts and the four mechanical jacks, and positioning accuracy of the upper portion of the guide tube can be guaranteed; and the rack is simple in structure and convenient to use.
Description
technical field [0001] The invention relates to a column-one-pile used for ultra-deep and ultra-large foundation pits, cover-excavated foundation pits, and subway transfer station foundation pits, in particular to a platform for positioning the upper part of a guide pipe. Background technique [0002] One-column-one-pile is widely used in ultra-deep and super-large foundation pits, cover-excavation foundation pits, and subway transfer station foundation pits. Its construction verticality requirements are much higher than those of ordinary engineering piles, and the general requirements are controlled at 1 / 500~1 / 600. The current one-column-one-pile construction method can only achieve 1 / 300 verticality. How to ensure the high precision of the verticality of one column and one pile, at least 1 / 600, and reduce the later engineering problems caused by the vertical deviation of the steel column? There is an urgent need for a steel column guide tube insertion process, guide tube...
Claims
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IPC IPC(8): E02D7/00E02D13/04
Inventor 卢礼顺胡晓虎
Owner 上海开普天岩土科技集团有限公司